>when people say "I post 3 to 5 paragraphs on average" like that's something to be proud of

You realize that later into the RP you'll be spreading so little butter on so much bread in your attempt to impress people with your novella-length posts that it's actually gonna have the opposite effect, right? Because you'll be desperate for things to say, any things, even things you've already said two or three times, and it will show. We'll be able to smell this desperation, and will basically stop reading your posts when we realize you exhausted your reservoirs of interesting things to say several posts ago.

And don't think posting a shit-ton of dialogue and turning your character into a garrulous sperg will fix this either. That's just a band-aid on a bullet hole.